Far less than cigarettes, probably little on their own — and nobody has run the study that would settle it. Extrinsic staining from a tobacco-free nicotine pouch has been measured exactly twice, both times by a manufacturer, and the pooled estimate crosses zero. The documented oral problem with these products is not staining at all. It is gum recession at the spot where the pouch sits.
This question gets answered badly because three separate things get merged into one. Tooth staining is a surface deposit. Gum recession is tissue pulling back from the tooth. Enamel erosion is mineral dissolving out of the tooth. They have different causes, different evidence and different answers, and the only way to answer the headline question honestly is to keep them apart. So that is how this page is organised.
The only two measurements that exist
Start with the direct answer to the direct question, because it is a short list.
One in-vitro study. In 2021, researchers soaked bovine enamel samples in product extracts for 86 days and measured colour change. The pouch arm came out at a ΔE of 4.10, against 28.50 for a reference cigarette, 18.30 for reference snus and 49.56 for red wine. Their summary: “THP, EC and modern oral exposure induced minimal staining levels that were also comparable to negative control samples.”
Read the control column before taking that at face value. The authors report that “The control ΔE mean and SD values at day 86 were 18.68 ± 3.89 for DMSO” and 2.17 for artificial saliva — and they say what that implies: the increase from day 1 to 86 “which suggests that the DMSO used to extract the samples contributes to the enamel sample staining levels.” The solvent alone stained more than the snus did. Every non-cigarette comparison in the study sits inside its own vehicle’s noise. The pouch figure of 4.10 is only interpretable against the saliva control of 2.17, which puts the pouch extract at about two ΔE units over 86 days.
And the funding is not a footnote: “This study was funded by British American Tobacco (BAT) R&D, Southampton, United Kingdom.”, with all authors employees of BAT or its contract lab, testing BAT’s own pouch brand against a competitor’s snus. One useful incidental finding, though: “Staining levels were reduced by brushing.”
One clinical trial. Altria’s 24-week study of smokers switching to its own pouch brand measured stain as a secondary endpoint: “Extrinsic tooth stain was measured at baseline, week 12 and week 24, according to the LSI” on up to 12 anterior teeth. It reported that “Lastly, a substantial reduction in staining (~70%) was observed through the LSI endpoint among AS using the TP.”
Three things have to travel with that number. The ~70% figure is the ten participants who switched completely; the whole test group came in at 59–62%. Every participant was descaled first — “at baseline, all subjects received full prophylaxis (all tartar, stain, and plaque removed)” — and the authors acknowledge that “This probably presented an opportunity for oral health improvement in both the CS and TP groups.” Most importantly, there was no non-user arm. Both groups were smokers. The study shows that stopping smoking and using pouches instead reduces stain compared with continuing to smoke. It cannot tell you whether a pouch stains more than nothing. It was “This study was fully funded by Altria Client Services LLC., Richmond, VA USA.”, with every author employed by the sponsor or its research site.
The independent pooling of this evidence is the most informative number available. A 2023 systematic review and meta-analysis, declaring that “The authors declare no conflict of interest.” and funded by no industry money, pooled the pouch data and found that “Pooled results show it caused minimally more stains than the artificial saliva control (MD: 0.48; 95% CI: −0.49, 1.44;” — a confidence interval that crosses zero. For smokeless tobacco in the same analysis, “Pooled results show it caused more stains than the artificial saliva control (MD: 9.09; 95% CI: 7.54, 10.64;”, and cigarettes came in at 16.22. Their plain-language summary: “Both products caused less color change than cigarette smoke”, and “Nicotine pouches were seen to stain less in comparison to smokeless tobacco”.
That is the whole evidence base. Two measurements, both industry-funded, one pooled estimate that is statistically null. No registered nicotine pouch trial anywhere has a tooth-stain, tooth-shade or discolouration outcome — the only near-hit in the registry is a sustained-attention test.
What is actually in a pouch that could stain
A tobacco-free pouch contains no tobacco, so the obvious chromogen source is absent. The published ingredient list for one widely sold dry pouch reads: “fillers (maltitol and microcrystalline cellulose), a stabilizer (hydroxypropyl cellulose)”, pH adjusters, a nicotine salt, flavourings and a sweetener. The moist version swaps in plant fibres, glycerine and a nicotine solution. Nothing in either list is a pigment. That analysis was “The study was funded by Swedish Match AB, who markets the ZYN and General products described in the article.” and “All authors are either employees of or otherwise funded by Swedish Match AB.” — unusually frank disclosure, and worth weighting accordingly.
The titanium dioxide claim is wrong, and it is the most useful correction on this page. You will read that pouches contain titanium dioxide as a whitener in the fleece. I searched for a primary source and could not find one. In that same ingredient paper, titanium dioxide appears twice — once in a nicotine lozenge and once in a nicotine gum, both pharmaceutical comparators. It appears in no pouch. A PubMed Central search for pouches plus titanium dioxide or E171 returns five papers; all five, read individually, are about something else. The nearest real datum is an elemental analysis that detected unquantified titanium among eleven elements by laser spectroscopy — which is a different claim from “TiO₂ added as a whitener”, and which I could not reach the primary text of.
The fleece itself has never been chemically characterised in any source I could find. Every paper stops at describing it as a non-woven material of a given size and weight.
On pH: pouch brand averages run from about 7.0 to 9.0, “which correspondingly ranged from 0.9% to 89.7% freebase nicotine.” That alkalinity is deliberate — “Nearly all ONP manufacturers acknowledged using chemicals to modify pouch pH, most commonly sodium bicarbonate and sodium carbonate”. Remember which direction that points: enamel demineralises in acid, below about pH 5.5. These products are neutral to alkaline. Whoever is running the “pouches are alkaline, so they erode enamel” argument online has the chemistry backwards.
The benchmark the reader actually has in mind
Most people asking this question are comparing against cigarettes, and that comparison is lopsided.
A self-funded in-vitro study on extracted human premolars put cigarette smoke at ΔE 16.5 on enamel against a control of 3.3, concluding that “CS results in more color changes on the enamel and cementum of teeth.” It also found mineral loss, with the enamel calcium-phosphorus ratio falling from 2.4 to 2.1 — the only hard-tissue mineral measurement anywhere in this area, and it is for cigarettes.
The mechanism is less well established than the folklore suggests. The one actual chemical identification comes via the meta-analysis above, describing a study in which “gas chromatography coupled to time‐of‐flight mass spectrometry was used to identify 11 compounds, of which 8 were terpenoids” in the particulate matter cigarette smoke deposits on enamel. The familiar line that tar stains and nicotine yellows is an assertion repeated in review discussions, not a measurement — and the claim that nicotine itself turns yellow on contact with air appears in peer-reviewed prose with no citation attached to it at all. Against it: the pooled pouch estimate is null, and two pharmaceutical trials in the 2000s were designed on the premise that oral nicotine gum reduces stain in smokers. Neither posted results, twenty years on.
Snus is the more interesting comparator, and here is the surprise: there is no measurement of tooth stain in actual snus users. A 2026 systematic review of 26 studies on Swedish snus and oral health does not contain the word “stain” anywhere. The only snus staining data in existence is the bovine-enamel soak above, where snus scored below its own solvent control.
Gums are where the evidence is, and it is not about colour
If you are worried about what a pouch does to your mouth, this is the section that matters.
That same 2026 review concludes that “There is substantial evidence that the use of Swedish snus is associated with gingival recession”, while being careful about what it is not: “Gingival recessions should not be conflated with periodontitis, as was unfortunately the case in a recently published systematic review and meta-analysis on smokeless tobacco and periodontitis”. Recession is the gum receding; periodontitis is destruction of the supporting bone. The evidence supports the first and does not establish the second.
The pattern is mechanical and local: “These recessions were most pronounced in the anterior region, typically corresponding to the site of snus placement.” The review also notes that recession appears independent of oral hygiene status, which points at pressure and local chemistry rather than at brushing. And there is an eightfold difference between loose snus and sachet-packed snus in one of the underlying studies — a sachet is what a pouch is, so that comparison is the closest structural analogy available.
For pouches specifically the evidence is thin and splits neatly along funding lines.
| Study | Design | Finding | Funder |
|---|---|---|---|
| Case reports, 2025 | 2 patients, no histology | Localised recession and leukoplakia at placement sites | None |
| Cross-sectional, 2025 | 26 male firefighters, 12 users | Worse periodontal measures in users | US National Institutes of Health |
| Cross-sectional, 2026 | 42 users | No association between lesion severity and use intensity | None |
| Switching study, 2026 | 45 snus users, 4 weeks, no control arm | Lesions improved | Swedish Match |
| Pilot, 2025 | 23 dentists, self-reported, no control | Self-reported lesions fell | Industry-linked |
The NIH-funded study puts the pattern plainly: “In this hypothesis-generating study, ONP use was associated with worse periodontal status and salivary microbiome shifts.” — and names the problem directly, observing that “The tobacco industry has an emerging research interest in oral health, with several industry-connected studies framing ONPs as less damaging than other tobacco products for tooth stain, gingivitis, mouth irritation, and other outcomes”. It declares that “The authors declared no potential conflicts of interest with respect to the research, authorship, and/or publication of this article.” Twenty-six firefighters is a very small study and the authors say so.
An independent critical review of 52 studies found only two covering pouches at all, and that “No studies on inflammation effects of HTP or ONP use were identified for this review.” — “There was no external funding for this project.” Its overall framing is the honest one for this whole topic: “use of ECs is associated with relatively fewer detrimental oral health effects compared to smoking, yet oral health status remains poorer compared to not using any tobacco/nicotine products.” Better than cigarettes, worse than nothing.
Enamel erosion: the question nobody has asked
I searched for any measurement of enamel erosion, demineralisation, surface microhardness or abrasion from a nicotine pouch. There is none. Not one study.
What exists runs the other way. A six-week crossover study found that “In healthy tobacco-based snus users, dental plaque acidogenicity decreased following ad libitum use of ZYN nicotine pouches” — plaque got less acidic, not more — though it was “This work was supported by Swedish Match North Europe AB, Stockholm, Sweden.” and had no non-user arm. Salivary pH has been measured as higher during snus use than hours after it. Both point away from an acid-erosion mechanism.
That is not a clean bill of health. It means the question has not been asked, and an unasked question has no answer in either direction. The 2026 snus review says the equivalent for decay: “Since there are no studies of white snus or tobacco-free snus, it is not possible to evaluate the risk of caries.”
Dry mouth: a chain of citations with nothing at the end
The dry-mouth route to staining and decay is biologically plausible and completely unsupported for these products. No study has measured salivary flow rate in nicotine pouch users. The claim that pouches cause dry mouth appears in a 2025 narrative review citing another review in a low-tier journal, which cites nothing primary. The NIH-funded study above lists salivary flow as a mechanism worth evaluating, explicitly as a hypothesis.
The American dental institute’s own page on dry mouth lists its causes as medicines, disease, radiation, chemotherapy and nerve damage — tobacco and nicotine are not among them, though its practical tips do say “Not using tobacco or alcohol. They dry out the mouth.” And a pouch in the lip provokes saliva while it is there. On the published evidence, this mechanism is unestablished in both directions.
What FDA has and has not said
This is worth getting exactly right, because “FDA says pouches are better for your teeth” is a claim people make and it is false.
On 30 June 2026, “On June 30, 2026, FDA issued modified risk granted orders to Swedish Match USA, Inc. for 20 ZYN nicotine pouch products.” The claim it authorised is a closed list: “Using ZYN instead of cigarettes puts you at a lower risk of mouth cancer, heart disease, lung cancer, stroke, emphysema, and chronic bronchitis.”
Six conditions. Mouth cancer, heart disease, lung cancer, stroke, emphysema, chronic bronchitis. Tooth staining is not one of them. Nor is gum recession, gum disease or tooth loss. I searched FDA’s own 48-page scientific review supporting that order: the words “gingivitis”, “periodontal”, “stain”, “enamel”, “caries”, “recession”, “leukoplakia” and even the phrase “oral health” appear zero times. “Mouth cancer” appears fourteen times. The only three hits for “dental” are inside the word “accidental”.
FDA’s authorised-product list is equally direct about scope: “There are 67 nicotine pouch products authorized by the FDA.”, “These are the only nicotine pouch products that may be lawfully sold in the United States.”, and the standing caveat that “While these products are authorized to be sold in the United States, it does not mean these products are safe, nor are they “FDA approved.”” followed by “All tobacco products are harmful and potentially addictive. Those who do not use tobacco products shouldn’t start.”
There is one more layer worth knowing. The ZYN order was granted partly by bridging to the epidemiological evidence underlying the earlier General Snus orders — and snus epidemiology is exactly the literature that shows gingival recession. A lower-risk finding on six named conditions says nothing about the outcome that literature actually documents.
What national authorities tell the public: essentially nothing
The UK’s oral health prevention toolkit, jointly issued by the four health departments and developed with the four UK Chief Dental Officers, was updated in September 2025. It does not contain the word “pouch” anywhere. It does say of tobacco generally that “It is also the most common risk factor for periodontal disease.” and instructs dentists to record staining as a clinical sign of tobacco use.
The US National Institute of Dental and Craniofacial Research has no tobacco topic at all among its 28 health-information pages. Its gum disease page, last reviewed August 2026, says “There are several risk factors for gum disease, but smoking or using tobacco products is the most significant.” — one of its supporting references being the smokeless-tobacco meta-analysis that the 2026 Swedish review criticised for conflating recession with periodontitis.
So no dental or health authority anywhere has published a consumer statement on nicotine pouches and tooth staining. That absence is the honest state of the field, not an endorsement.
What I would actually watch
On the evidence as it sits, staining is the least of it. The thing that is documented, repeatedly and across study types, is localised tissue change at the exact spot where the pouch is parked. That is what rotating placement is for, and it is why the 2026 review’s finding that recession appears independent of oral hygiene matters — you cannot brush your way out of a mechanical and chemical insult at one site.
If you are comparing against cigarettes, every line of evidence here says the pouch stains less, and considerably. If you are comparing against not using anything, there is no study that makes that comparison, and the one independent review that framed the question concluded that oral health status remains poorer than in people using nothing. Nicotine is addictive and no nicotine product is safe; the lowest-risk option is stopping entirely.
One last note on how this topic gets reported. The most-cited summary you will find is a narrative review that hedges itself honestly — “we might anticipate that we will see similar effects in nicotine pouch users due to their similar methods of administration” — and then gets quoted as if “we might anticipate” were a finding. It is a conjecture about chewing tobacco applied to a sealed sachet. Treat it as one.
Frequently asked questions
Do nicotine pouches stain teeth?
On the only pooled estimate available, minimally and not significantly — mean difference 0.48 with a confidence interval crossing zero. Both underlying measurements were funded by pouch manufacturers, and no independent study has been run.
Do they stain less than cigarettes?
Yes, by a wide margin in every measurement that exists. The in-vitro ΔE figures are roughly 4 for a pouch against 28 for a cigarette over 86 days, and the pooled cigarette estimate is thirty times the pouch estimate.
Do they stain less than snus?
On the in-vitro data, yes — pouch 4.10 against snus 18.30, though snus scored below the study’s own solvent control. There is no measurement of staining in actual snus users at all.
Will whitening toothpaste remove pouch stain?
No study has tested it on pouch users. The one relevant observation is from the in-vitro work, where “Staining levels were reduced by brushing.”
Do pouches cause gum recession?
For snus, there is substantial evidence of an association, localised to the placement site. For tobacco-free pouches the evidence is two case reports and one 26-person cross-sectional study finding worse periodontal measures, against two manufacturer-funded studies in existing snus users finding improvement. It is not settled, and the gap is the most important one in this area.
Do pouches damage enamel?
No measurement exists. The available chemistry points away from acid erosion, since pouches are neutral to alkaline, but nobody has measured enamel from a pouch user.
Is titanium dioxide in nicotine pouches?
Not in any ingredient list I could source. Where it appears in the published literature on oral nicotine, it is in nicotine lozenges and gum, not pouches.
Related on this site: what is inside a nicotine pouch besides nicotine, pouch fleece materials, pouch pH and why it changes the hit, where to place a nicotine pouch under your lip and snus and saliva. Today’s companions: can you use two nicotine pouches at once? and handmade vs machine-made snus. The pillar is nicotine pouches explained: the complete guide; on the evidence around switching, see quitting smoking with pouches. For product choices, the master ranking.
The companion question, and a very different evidence picture: nicotine pouches and dry mouth.
Sources
- Dalrymple A et al., Enamel staining with e-cigarettes, tobacco heating products and modern oral nicotine products compared with cigarettes and snus: An in vitro study, American Journal of Dentistry 2021;34(1):3–9. Funded by British American Tobacco R&D; all authors employees of BAT or Intertek. Full text not open access; figures above are from the structured abstract.
- Karanjkar R, Preshaw PM, Holliday R et al., Effect of tobacco and nicotine in causing staining of dental hard tissues and dental materials: A systematic review and meta-analysis, Clinical and Experimental Dental Research 2023. PROSPERO CRD42018086331. No conflicts of interest declared; no industry funding. Search ran to December 2021.
- Liu J et al., Oral Health Effects Among Adults Switching from Cigarettes to on! Nicotine Pouches Compared to Those Who Continue Smoking, Oral Health & Preventive Dentistry 2025;23:189–201. Fully funded by Altria Client Services LLC.
- Lundgren J et al., Harmful and potentially harmful constituents (HPHCs) in two novel nicotine pouch products, BMC Chemistry. Funded by Swedish Match AB; all authors employed or funded by the sponsor.
- Page MK, Leigh NJ, Goniewicz ML et al., Comparison of Nicotine and Selected Flavoring Contents Between Tobacco-Free and Tobacco-Containing Oral Pouches, Nicotine & Tobacco Research. NCI-funded (U54 CA228110, P01 CA200512).
- Swedish smokeless tobacco and its impact on oral health: a systematic review, Acta Odontologica Scandinavica 2026, University of Gothenburg. PROSPERO CRD420251068717. No funding or conflict-of-interest statement appears in the published record.
- Oral Nicotine Pouch Use and Associations with Periodontal Status and Salivary Microbiome Dysbiosis, JDR Clinical & Translational Research. US National Institutes of Health (R01DE032433, U01DE033351); no conflicts declared.
- Alkhatib OA, Localized gingival recession and leukoplakia associated with nicotine pouch use: two clinical case reports, BMC Oral Health 2025;25:2004. No external funding.
- Single-use and six-week effects of a non-tobacco nicotine pouch on dental plaque characteristics, BMC Oral Health. Supported by Swedish Match North Europe AB.
- Oral health risks in adults who use electronic nicotine delivery systems and oral nicotine pouches: a critical review, Harm Reduction Journal. No external funding; no competing interests.
- Evaluating the Effects of Cigarette Smoking and Heated Tobacco Products on Hard Dental Tissues, Clinical and Experimental Dental Research 2024;10:e941. Self-funded; no conflicts declared.
- Oral Health Consequences of Smokeless Tobacco Use: A Narrative Review, Cureus. No funding declared. Cited here only for its own hedged conjecture about pouches.
- US Food and Drug Administration, Swedish Match USA, Inc. Modified Risk Tobacco Product (MRTP) Applications — ZYN products, and the accompanying Technical Project Lead review; Nicotine Pouch Products Authorized by the FDA, content current as of 30 October 2026.
- Department of Health and Social Care et al., Delivering better oral health: chapter 11, smoking and tobacco use, updated 10 September 2025.
- National Institute of Dental and Craniofacial Research, Gum Disease (last reviewed August 2026) and Dry Mouth (last reviewed October 2024).
- Oral nicotine pouches and public health: evidence from an updated scoping review, Nicotine & Tobacco Research. NIH/NCI and FDA grant 2U54CA229974.
Last verified 9 November 2026. Literature and registry searches described above were run on that date; where this page states that no study exists, that reflects searches of PubMed Central and ClinicalTrials.gov as of then.
